Possible Clues:

• Bedroom battle
• Melee in which feathers fly
• Sleepover free-for-all
• Bedroom battle (where feathers fly?)
• Its combatants may have thrown down weapons
• Bedroom conflict
• Bout with padded weapons
• Sleepover activity, perhaps
• Sleepover battle
• Scrap between two youngsters that's followed by the rest?